CN105814804B - The method, apparatus and system that crosstalk is eliminated - Google Patents
The method, apparatus and system that crosstalk is eliminated Download PDFInfo
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- CN105814804B CN105814804B CN201480033628.XA CN201480033628A CN105814804B CN 105814804 B CN105814804 B CN 105814804B CN 201480033628 A CN201480033628 A CN 201480033628A CN 105814804 B CN105814804 B CN 105814804B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B3/00—Line transmission systems
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- H04B3/487—Testing crosstalk effects
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Abstract
The embodiment of the present invention provides the method, apparatus and system that a kind of crosstalk is eliminated.The method that crosstalk of the present invention is eliminated, including：When the quantity of online customer headend equipment CPE will change, the type of the type of online CPE and anticipation CPE online after changing before determining variation；The type of CPE refers to that online CPE is entirely the mixing of non-linear CPE or non-linear CPE and linear CPE；Linear CPE is that pair circuit being connected with CPE is only supported to carry out the CPE of linear crosstalk elimination, and non-linear CPE is the CPE that the support pair circuit being connected with CPE carries out linear crosstalk elimination simultaneously and nonlinear crosstalk is eliminated；If it is determined that variation before in the type of CPE and the Type-Inconsistencies of online CPE after the variation of anticipation, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation CPE online before variation of line send indication message.The embodiment of the present invention solves the problems, such as that the CPE of different mode cannot reach the standard grade simultaneously, improves communication performance.
Description
Technical field
The present embodiments relate to the method, apparatus and system that the communication technology more particularly to a kind of crosstalk are eliminated.
Background technology
In digital subscriber line (the Digital Subscriber for employing copper wire broadband access technology (G.fast)
Line, referred to as：DSL) to spread spectrum in technology, frequency band is up to 212MHz, therefore International Telecommunication Union's telecommunication standards
Organize (International Telecommunication Union for Telecommunication
Standardization Sector, referred to as：ITU-T) adopt time division multiplexing (Time Division Duplexing, abbreviation：
TDD) as the duplex mode of G.fast.Due to electromagnetic induction principle, DSL couple in multiplexers (DSL Access
Multiplexer, referred to as：DSLAM crosstalk can be generated between multiple signals).
In the prior art, it is mainly eliminated using linear crosstalk, realizes that crosstalk is eliminated by linear predictive coding and crosstalk counteracting,
But since G.fast is very serious in the crosstalk of 212MHz high bands, linear predictive coding and crosstalk counteracting are in a part for high band
It is difficult to provide significant signal-to-noise ratio (Signal-to-Noise Ratio, abbreviation on subcarrier：SNR) gain, therefore industry starts
Nonlinear crosstalk is paid close attention to eliminate.
But current crosstalk elimination cannot be compatible with linearity and non-linearity both of which simultaneously, lead to the use of different mode
Family headend equipment (Customer Premises Equipment, referred to as：CPE it) cannot reach the standard grade simultaneously, for example, non-linear CPE is first
It reaches the standard grade, the linear CPE of reactivation, vector quantization controlled entity (Vectoring Control Entity, referred to as：VCE it) needs to limit
The linear CPE reaches the standard grade or all non-linear CPE to have reached the standard grade goes offline, and then non-linear CPE is again again on linear model
Line.It greatly affected the communication performance of G.fast in this way.
Invention content
The embodiment of the present invention provides the method, apparatus and system that a kind of crosstalk is eliminated, cannot with the CPE for solving different mode
The problem of reaching the standard grade simultaneously improves the communication performance of G.fast.
In a first aspect, the embodiment of the present invention provides a kind of method that crosstalk is eliminated, including：
When the quantity of online customer headend equipment CPE will change, determine online CPE's before the variation
The type of online CPE after type and the anticipation variation；The type of the CPE refers to that online CPE is entirely non-linear
The mixing of CPE or non-linear CPE and linear CPE；The linear CPE is only pair circuit being connected with CPE to be supported to carry out linearly
The CPE that crosstalk is eliminated, the non-linear CPE are that pair circuit being connected with CPE is supported to carry out linear crosstalk elimination and non-thread simultaneously
Property crosstalk eliminate CPE；
If in the type of the CPE of line and the type of CPE online after the variation of the anticipation before the determining variation
Inconsistent, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation is online before the variation
CPE send indication message, the indication message includes being used to indicate the crosstalk that CPE is used after the variation and disappearing
Except mode.
With reference to first aspect, it is described to work as online user front end in the first possible realization method of first aspect
When the quantity of equipment CPE will change, after determining the type of online CPE before the variation and the anticipation variation
The type of online CPE, including：
When at least one linear CPE reaches the standard grade, determine that online CPE before described reach the standard grade is entirely non-linear CPE, described in anticipation
Online CPE is the mixing of non-linear CPE and linear CPE after reaching the standard grade；
If in the type of the CPE of line with CPE's online after the variation of the anticipation before the determining variation
Type-Inconsistencies, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation is before the variation
Online CPE sends indication message, including：
It is described it is determining reach the standard grade before the type of CPE online after the reaching the standard grade of type and the anticipation of the CPE of line differ
Cause, then the linear crosstalk cancellation supported according to the type of CPE online after the reaching the standard grade of the anticipation before described reach the standard grade
The CPE of line sends the indication message.
With reference to first aspect, it is described to work as online user front end in second of possible realization method of first aspect
When the quantity of equipment CPE will change, after determining the type of online CPE before the variation and the anticipation variation
The type of online CPE, including：
When all online linear CPE are offline, determine that the offline preceding online CPE is non-linear CPE and linear CPE
Mixing, the anticipation offline rear online CPE is entirely non-linear CPE；
If in the type of the CPE of line with CPE's online after the variation of the anticipation before the determining variation
Type-Inconsistencies, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation is before the variation
Online CPE sends indication message, including：
The type of online CPE differs after the determining type of the offline preceding CPE in line and the offline of the anticipation
Cause, then according to the anticipation it is offline after online CPE the nonlinear crosstalk cancellation supported of type to it is described it is offline before
Online CPE sends the indication message.
With reference to first aspect, the first of first aspect is to any possible realization method in second, in first party
In the third possible realization method in face, before the online CPE before the variation sends indication message, institute
The method of stating further includes：
If the crosstalk cancellation that the type of online CPE is supported after the variation of the anticipation is linear crosstalk elimination side
Formula then obtains linear crosstalk rain scavenging coefficient according to the linear crosstalk cancellation；
If the crosstalk cancellation that the type of online CPE is supported after the variation of the anticipation is eliminated for nonlinear crosstalk
Mode then obtains nonlinear crosstalk rain scavenging coefficient according to the nonlinear crosstalk cancellation.
The third possible realization method with reference to first aspect, in the 4th kind of possible realization method of first aspect
In, the indication message further includes the nonlinear crosstalk rain scavenging coefficient.
With reference to first aspect, the first of first aspect is to any possible realization method in the 4th kind, in first party
In the 5th kind of possible realization method in face, the indication message is to be encapsulated in the online preset field re-matched in signaling
Information.
Second aspect, the embodiment of the present invention provide a kind of method that crosstalk is eliminated, including：
The indication message that vector quantization controlled entity VCE is sent is received, the indication message includes being used to indicate
The information of crosstalk cancellation；
Crosstalk elimination is carried out by the crosstalk cancellation that the indication message indicates.
The third aspect, the embodiment of the present invention provide a kind of vector quantization controlled entity VCE, including：
Determination type module, it is described for when the quantity of online customer headend equipment CPE will change, determining
The type of CPE online after the type of online CPE and the anticipation variation before variation；The type of the CPE refers to online
CPE be entirely non-linear CPE or non-linear CPE and linear CPE mixing；The linear CPE be only support pair and CPE
Connected circuit carries out the CPE of linear crosstalk elimination, and the non-linear CPE is pair circuit being connected with CPE to be supported to carry out simultaneously
The CPE that linear crosstalk is eliminated and nonlinear crosstalk is eliminated；
Transceiver module, if for before the determining variation after the type of CPE of line and the variation of the anticipation
The Type-Inconsistencies of the CPE of line, then according to the crosstalk cancellation that the type of CPE online after the variation of anticipation is supported to institute
It states CPE online before changing and sends indication message, the indication message includes being used to indicate CPE after the variation
The crosstalk cancellation of use.
With reference to the third aspect, in the first possible realization method of the third aspect, the determination type module, specifically
It reaches the standard grade for working as at least one linear CPE, determines that online CPE before described reach the standard grade is entirely non-linear CPE, reach the standard grade described in anticipation
Online CPE is the mixing of non-linear CPE and linear CPE afterwards；
The transceiver module, specifically for it is described it is determining reach the standard grade before the online type of CPE and reaching the standard grade for the anticipation
The Type-Inconsistencies of online CPE afterwards, the then linear crosstalk supported according to the type of CPE online after the reaching the standard grade of the anticipation disappear
Except mode CPE online before described reach the standard grade sends the indication message.
With reference to the third aspect, in second of possible realization method of the third aspect, the determination type module, specifically
Offline for working as all online linear CPE, it is the mixed of non-linear CPE and linear CPE to determine the offline preceding online CPE
It closes, the anticipation offline rear online CPE is entirely non-linear CPE；
The transceiver module, specifically for the determining offline preceding online CPE type and the anticipation it is offline
The Type-Inconsistencies of online CPE afterwards, the then nonlinear crosstalk supported according to the type of the offline rear online CPE of the anticipation
Cancellation sends the indication message to the offline preceding online CPE.
With reference to the third aspect, the third aspect the first to any possible realization method in second, in third party
In the third possible realization method in face, further include：
Acquisition module, if the crosstalk cancellation that the type of CPE online after variation for the anticipation is supported is
Linear crosstalk cancellation then obtains linear crosstalk rain scavenging coefficient according to the linear crosstalk cancellation；If the anticipation
The crosstalk cancellation that the type of online CPE is supported after variation is nonlinear crosstalk cancellation, then according to described non-thread
Property crosstalk cancellation obtain nonlinear crosstalk rain scavenging coefficient.
With reference to the third possible realization method of the third aspect, in the 4th kind of possible realization method of the third aspect
In, the indication message further includes the nonlinear crosstalk rain scavenging coefficient.
With reference to the third aspect, the third aspect the first to any possible realization method in the 4th kind, in third party
In the 5th kind of possible realization method in face, the indication message is to be encapsulated in the online preset field re-matched in signaling
Information.
Fourth aspect, the embodiment of the present invention provide a kind of customer headend equipment CPE, including：
Receiving module, for receiving the indication message of vector quantization controlled entity VCE transmissions, the indication message
Information including being used to indicate crosstalk cancellation；
Processing module, the crosstalk cancellation for being indicated by the indication message carry out crosstalk elimination.
5th aspect, the embodiment of the present invention provide a kind of vector quantization controlled entity VCE, including：
Processor, for when the quantity of online customer headend equipment CPE will change, before determining the variation
The type of online CPE after the type of online CPE and the anticipation variation；The type of the CPE refers to online CPE
The mixing of entirely non-linear CPE or non-linear CPE and linear CPE；The linear CPE only supports pair with CPE to be connected
Circuit carries out the CPE of linear crosstalk elimination, and the non-linear CPE is to support that pair circuit being connected with CPE is linearly gone here and there simultaneously
Disturb the CPE of elimination and nonlinear crosstalk elimination；
Transmitter, if for before the determining variation after the type of CPE of line and the variation of the anticipation it is online
CPE Type-Inconsistencies, then according to the crosstalk cancellation that the type of CPE online after the variation of anticipation is supported to described
Online CPE sends indication message before variation, and the indication message is adopted including being used to indicate CPE after the variation
Crosstalk cancellation.
With reference to the 5th aspect, in the first possible realization method of the 5th aspect, the processor, specifically for working as
At least one linear CPE reaches the standard grade, and determines that online CPE before described reach the standard grade is entirely non-linear CPE, online after reaching the standard grade described in anticipation
CPE be non-linear CPE and linear CPE mixing；
The transmitter, specifically for it is described it is determining reach the standard grade before after the reaching the standard grade of type and the anticipation of the CPE of line
The Type-Inconsistencies of online CPE are then eliminated according to the linear crosstalk that the type of CPE online after the reaching the standard grade of the anticipation is supported
Mode CPE online before described reach the standard grade sends the indication message.
With reference to the 5th aspect, in second of possible realization method of the 5th aspect, the processor, specifically for working as
All online linear CPE are offline, and it is the mixing of non-linear CPE and linear CPE to determine the offline preceding online CPE, anticipation
The offline rear online CPE is entirely non-linear CPE；
The transmitter, specifically for it is described it is determining it is offline before line the type of CPE with after the offline of the anticipation
The Type-Inconsistencies of online CPE, the then nonlinear crosstalk supported according to the type of the offline rear online CPE of the anticipation disappear
Except mode to the offline preceding online CPE sends the indication message.
With reference to the 5th aspect, the 5th aspect the first to any possible realization method in second, in the 5th side
In the third possible realization method in face, the processor, if the type of CPE online after being additionally operable to the variation of the anticipation
The crosstalk cancellation supported is linear crosstalk cancellation, then obtains linear crosstalk according to the linear crosstalk cancellation
Rain scavenging coefficient；If the crosstalk cancellation that the type of online CPE is supported after the variation of the anticipation disappears for nonlinear crosstalk
Except mode, then nonlinear crosstalk rain scavenging coefficient is obtained according to the nonlinear crosstalk cancellation.
With reference to the third possible realization method of the 5th aspect, in the 4th kind of possible realization method of the 5th aspect
In, the indication message further includes the nonlinear crosstalk rain scavenging coefficient.
With reference to the 5th aspect, the 5th aspect the first to any possible realization method in the 4th kind, in the 5th side
In the 5th kind of possible realization method in face, the indication message is to be encapsulated in the online preset field re-matched in signaling
Information.
6th aspect, the embodiment of the present invention provide a kind of customer headend equipment CPE, including：
Receiver, for receiving the indication message of vector quantization controlled entity VCE transmissions, the indication message packet
Include the information for being used to indicate crosstalk cancellation；
Processor, the crosstalk cancellation for being indicated by the indication message carry out crosstalk elimination.
7th aspect, the embodiment of the present invention provide a kind of copper wire broadband access system, including：Vector quantization controlled entity VCE,
Central office CO, only pair circuit being connected with customer headend equipment CPE is supported to carry out linear CPE, Yi Jitong of linear crosstalk elimination
When pair circuit being connected with CPE is supported to carry out a non-linear CPE for linear crosstalk elimination and nonlinear crosstalk elimination；The VCE is adopted
With the third aspect, the third aspect the first to the VCE described in any possible realization method in the 5th kind, it is described non-linear
CPE is using the CPE described in the possible realization method of fourth aspect.
Eighth aspect, the embodiment of the present invention provide a kind of copper wire broadband access system, including：Vector quantization controlled entity VCE,
Central office CO, only pair circuit being connected with customer headend equipment CPE is supported to carry out linear CPE, Yi Jitong of linear crosstalk elimination
When pair circuit being connected with CPE is supported to carry out a non-linear CPE for linear crosstalk elimination and nonlinear crosstalk elimination；The VCE is adopted
It is described non-linear with the first in terms of the 5th aspect, the 5th to the VCE described in any possible realization method in the 5th kind
CPEs of the CPE described in using the 6th possible realization method of aspect.
The method, apparatus and system that crosstalk of the embodiment of the present invention is eliminated are determined by the crosstalk elimination used according to CPE
The pattern of switching, and CPE is notified to switch in a manner of indicating information, it realizes the online switching of CPE, solves different mode
The problem of CPE cannot reach the standard grade simultaneously improves the communication performance of G.fast.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow chart of the one embodiment for the method that crosstalk of the present invention is eliminated；
Fig. 2 is the flow chart of another embodiment of the method that crosstalk of the present invention is eliminated；
Fig. 3 is the flow chart of the further embodiment for the method that crosstalk of the present invention is eliminated；
Fig. 4 is the flow chart of another embodiment of the method that crosstalk of the present invention is eliminated；
Fig. 5 is the structure diagram of one embodiment of VCE of the present invention；
Fig. 6 is the structure diagram of another embodiment of VCE of the present invention；
Fig. 7 is the structure diagram of one embodiment of CPE of the present invention；
Fig. 8 is the structure diagram of the further embodiment of VCE of the present invention；
Fig. 9 is the structure diagram of another embodiment of CPE of the present invention；
Figure 10 is the structure diagram of one embodiment of copper wire broadband access system of the present invention.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without creative efforts shall fall within the protection scope of the present invention.
Fig. 1 is the flow chart of the one embodiment for the method that crosstalk of the present invention is eliminated, as shown in Figure 1, the side of the present embodiment
Method can include：
Step 101, when the quantity of online CPE will change, determine the class of online CPE before the variation
The type of online CPE after type and the anticipation variation；
The type of the CPE refers to that online CPE is entirely the mixed of non-linear CPE or non-linear CPE and linear CPE
It closes；The linear CPE is only pair circuit being connected with CPE to be supported to carry out the CPE of linear crosstalk elimination, and the non-linear CPE is
The CPE that pair circuit being connected with CPE carries out linear crosstalk elimination and nonlinear crosstalk is eliminated is supported simultaneously.
The executive agent of the present embodiment can be vector quantization controlled entity (Vectoring Control Entity, abbreviation：
VCE).In the prior art, the method that crosstalk is eliminated cannot be compatible with linearity and non-linearity both of which simultaneously, if non-linear use
Family headend equipment (Customer Premises Equipment, referred to as：CPE it) first reaches the standard grade, linear CPE will subsequently reach the standard grade, VCE
In view of linear CPE only supports the ability that linear crosstalk is eliminated, two kinds of processing methods may be used：Or it limits on the linear CPE
Line；Or all non-linear CPE on line all go offline, non-linear CPE is only switched to the mould of linear crosstalk elimination
Formula is reached the standard grade again.Both methods all can greatly influence the communication performance of copper wire broadband access technology (G.fast) no matter
It is that limitation is reached the standard grade, the reclosing that still goes offline can all influence the normal communication of user.In the present invention, as linear CPE and non-linear CPE
When common online, it is limited to the ability of linear CPE, VCE, CPE, central office (Central Office, letter in G.fast systems
Claim：) etc. CO equipment can only use linear crosstalk cancellation to eliminate the crosstalk between multiple signals, and if only non-linear CPE
When online, the equipment in G.fast systems can use nonlinear crosstalk cancellation to eliminate the crosstalk between multiple signals.Cause
This, as long as the quantity of CPE online in G.fast systems will change, VCE will first determine online CPE before the variation
Type, and prejudge the type of online CPE after the variation.
It is if online after the type of CPE of line and the variation of the anticipation before step 102, the determining variation
The Type-Inconsistencies of CPE, then according to the crosstalk cancellation that the type of CPE online after the variation of anticipation is supported to the change
Online CPE sends indication message before change.
The indication message includes being used to indicate the crosstalk cancellation that CPE is used after the variation.
After the type of CPE online after the type of the CPE of line and the variation prejudged before variation is determined VCE, such as
The Type-Inconsistencies of online CPE before and after fruit variation, i.e., it is entirely non-linear CPE that one of them, which is online CPE, the other is
Online CPE is the mixing of non-linear CPE and linear CPE, and VCE will be propped up according to the type of CPE online after variation at this time
The crosstalk cancellation held CPE online before variation sends indication message, so that these CPE are currently in use by its
Crosstalk cancellation is switched to the mode of instruction.It is to support linear crosstalk elimination algorithm and non-simultaneously due to there was only non-linear CPE
Linear crosstalk elimination algorithm, therefore CPE online before variation in the present invention sends the main sending object of indication message
It is non-linear CPE, i.e. VCE sends indication message by online CPE before variation, realizes that the online of non-linear CPE cuts
It changes, reaches the standard grade again after going offline in the prior art without picture, and because non-linear CPE can be switched to and be disappeared using linear crosstalk
Except mode, it is not required that because G.fast systems do not use currently linear crosstalk to eliminate and limit reaching the standard grade for linear CPE；Alternatively,
After all linear CPE are offline, non-linear CPE can switch to the better nonlinear crosstalk of effect and eliminate online, improve
Communication performance.Indication message includes the information of crosstalk cancellation for indicating that CPE is used after variation, and the information is for example
It can be the information of a byte, if this byte is set to 1, represent linear crosstalk cancellation, be set to 0, represent non-linear
Crosstalk cancellation.There can also be the mode of other instruction switchings, the present invention is not specifically limited this.
The present embodiment, VCE trigger the change of crosstalk cancellation by the variation of the type according to online CPE, and with
It indicates that the mode of information notifies CPE online before changing to switch over, realizes the online switching of CPE, solve the CPE of different mode
The problem of cannot reaching the standard grade simultaneously, improves the communication performance of G.fast.
Further, the indication message is the information being encapsulated in the online preset field re-matched in signaling.
Specifically, VCE judge variation before and variation after after the Type-Inconsistencies of the CPE of line, according to anticipation
The crosstalk cancellation that the type of online CPE is supported after variation directly can send an individual information, the information to CPE
Indication message can also be filled in existing online re-matching (Online by as indication message
Reconfiguration, referred to as：OLR) in some preset field in signaling, an arrow pattern switch (Vector is formed
Mode Switch, referred to as：VMS) OLR signalings.
Fig. 2 is the flow chart of another embodiment of the method that crosstalk of the present invention is eliminated, as shown in Fig. 2, the present embodiment
Method can include：
Step 201 receives the indication message that VCE is sent；
The indication message includes the information for being used to indicate crosstalk cancellation.
The executive agent of the present embodiment can support linear crosstalk cancellation and nonlinear crosstalk cancellation simultaneously
CPE.The CPE receives the indication message that VCE is sent when G.fast systems need to switch crosstalk cancellation,
By the indication message, CPE be would know that will using crosstalk eliminate by the way of.
Step 202 carries out crosstalk elimination by the crosstalk cancellation that the indication message indicates.
After CPE knows the crosstalk cancellation that will be used according to indication message, it is possible to currently using
Crosstalk cancellation switched online, and using the crosstalk cancellation carry out crosstalk elimination.
The present embodiment, CPE by being switched online to currently employed crosstalk cancellation according to indication message,
And crosstalk elimination is carried out using the crosstalk cancellation after switching, the CPE for solving the problems, such as different mode cannot reach the standard grade, carry simultaneously
The communication performance of high G.fast.
Below using several specific embodiments, the technical solution of embodiment of the method shown in Fig. 1 or Fig. 2 is carried out specifically
It is bright.In following methods embodiment, G.fast systems include VCE, non-linear CPE, linear CPE and CO, wherein linear CPE and
Non-linear CPE is respectively there are one more than.
Fig. 3 is the flow chart of the further embodiment for the method that crosstalk of the present invention is eliminated, as shown in figure 3, the present embodiment
The current state of method is non-linear CPE, and all non-linear CPE are disappeared using nonlinear crosstalk for all online CPE
Except mode, this method can include：
The request of reaching the standard grade that s301, at least one linear CPE are sent to CO；
S302, CO request that will reach the standard grade are transmitted to VCE；
S303, VCE determine that CPE online before reaching the standard grade is entirely non-linear CPE, and anticipation CPE online after reaching the standard grade is non-thread
Property CPE and linear CPE mixing；
Since before at least one linear CPE sends out request of reaching the standard grade, online CPE is all non-thread in G.fast systems
Property CPE, and VCE, non-linear CPE, CO all be use nonlinear crosstalk cancellation, at this time because linear CPE will on
Line, thus VCE prejudge out the type of CPE online after reaching the standard grade by become be non-linear CPE and linear CPE mixing, this with it is upper
The Type-Inconsistencies of online CPE before line.
S304, VCE refer to switching according to the linear crosstalk cancellation that the type of CPE online after the reaching the standard grade of anticipation is supported
Show that information is sent to CO；
Since CPE online after reaching the standard grade includes non-linear CPE and linear CPE, wherein linear CPE be do not support it is non-linear
Crosstalk cancellation, therefore the G.fast systems after linear CPE reaches the standard grade can only use linear crosstalk cancellation.This feelings
Under condition, and signal-to-noise ratio (Signal/Noise, referred to as：SNR) it is possible that can decline, in order to avoid there is error code, need to reduce carrying
The bit number of data according to current SNR and can consider that the SNR losses that may be brought after switching are eliminated in crosstalk, estimate out switching
SNR afterwards, and obtain new linear crosstalk rain scavenging coefficient.The indication message that VCE is sent can be an individual message,
It can also be packaged in the preset field in OLR signalings, OLR signalings for example can be that transmitter initiates gain-adjusted
(Transmitter Initiated Gain Adjustment, referred to as：TIGA), TIGA reserved fields are preset into a field
As filling in indication message.
Indication message is transmitted to by s305, CO reach the standard grade before online CPE；
S306, CPE and CO are carried out at the same time switching and carry out crosstalk elimination using linear crosstalk cancellation.
The present embodiment, VCE trigger the change of crosstalk cancellation by the variation of the type according to online CPE, and with
It indicates that the mode of information notifies CPE online before changing to switch over, realizes the online switching of CPE, solve the CPE of different mode
The problem of cannot reaching the standard grade simultaneously, improves the communication performance of G.fast.
Fig. 4 is the flow chart of another embodiment of the method that crosstalk of the present invention is eliminated, as shown in figure 4, the present embodiment
The current state of method includes linear CPE and non-linear CPE for all online CPE, and all online CPE are using linear
Crosstalk is eliminated, and this method can include：
S401, CO receive the offline information of all online linear CPE；
Offline information is transmitted to VCE by s402, CO；
S403, VCE determine that offline preceding online CPE is the mixing of non-linear CPE and linear CPE, prejudge offline rear online
CPE be entirely non-linear CPE；
Due to before all online linear CPE are offline, online CPE includes linear CPE and non-in G.fast systems
Linear CPE, and VCE, linear CPE, non-linear CPE, CO are the linear crosstalk cancellations used, it is at this time because all
Linear CPE i.e. will be offline, thus VCE prejudge out it is offline after the type of online CPE will become to be only non-linear CPE, this with
The Type-Inconsistencies of offline preceding online CPE.
S404, VCE will switch according to the nonlinear crosstalk cancellation that the type of the offline rear online CPE of anticipation is supported
Instruction information is sent to CO；
Since online CPE after offline only includes non-linear CPE, linear CPE it is offline after G.fast systems
Nonlinear crosstalk cancellation may be used in system.The indication message that VCE is sent can be an individual message, can also
It is packaged in the preset field in OLR signalings, OLR signalings for example can be TIGA, and TIGA reserved fields are preset a word
Section is used as filling in indication message.
Indication message is transmitted to offline preceding online CPE by s405, CO；
S406, CPE and CO are carried out at the same time switching and carry out crosstalk elimination using nonlinear crosstalk cancellation.
The present embodiment, VCE trigger the change of crosstalk cancellation by the variation of the type according to online CPE, and with
It indicates that the mode of information notifies CPE online before changing to switch over, realizes the online switching of CPE, solve the CPE of different mode
The problem of cannot reaching the standard grade simultaneously, improves the communication performance of G.fast.
Fig. 5 is the structure diagram of one embodiment of VCE of the present invention, as shown in figure 5, the device of the present embodiment can wrap
It includes：Determination type module 11 and transceiver module 12, wherein, determination type module 11, for working as online customer headend equipment CPE
Quantity when will change, determine online after the online type of CPE before the variation and the anticipation variation
The type of CPE；The type of the CPE refers to that online CPE is entirely non-linear CPE or non-linear CPE and linear CPE
Mixing；The linear CPE is only pair circuit being connected with CPE to be supported to carry out the CPE, the non-linear CPE of linear crosstalk elimination
It is the CPE that pair circuit being connected with CPE is supported to carry out linear crosstalk elimination and nonlinear crosstalk elimination simultaneously；Transceiver module 12,
If the type and the type of CPE online after the variation of the anticipation in the CPE of line before the determining variation differ
It causes, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation CPE online before the variation
Indication message is sent, the indication message includes being used to indicate the crosstalk elimination side that CPE is used after the variation
Formula.
The device of the present embodiment can be used for performing the technical solution of embodiment of the method shown in Fig. 1, realization principle and skill
Art effect is similar, and details are not described herein again.
Further, the determination type module 11 is reached the standard grade specifically for working as at least one linear CPE, is determined on described
Online CPE is entirely non-linear CPE before line, and online CPE is the mixed of non-linear CPE and linear CPE after reaching the standard grade described in anticipation
It closes；The transceiver module 12, specifically for it is described it is determining reach the standard grade before after the reaching the standard grade of type and the anticipation of the CPE of line
The Type-Inconsistencies of the CPE of line, then the linear crosstalk elimination side supported according to the type of CPE online after the reaching the standard grade of the anticipation
Formula CPE online before described reach the standard grade sends the indication message.
Further, the determination type module 11, it is offline specifically for working as all online linear CPE, it determines described
Offline preceding online CPE is the mixing of non-linear CPE and linear CPE, and the anticipation offline rear online CPE is entirely non-linear
CPE；The transceiver module 12, specifically for it is described it is determining it is offline before line the type of CPE with after the offline of the anticipation
The Type-Inconsistencies of online CPE, the then nonlinear crosstalk supported according to the type of the offline rear online CPE of the anticipation disappear
Except mode to the offline preceding online CPE sends the indication message.
Fig. 6 is the structure diagram of another embodiment of VCE of the present invention, as shown in fig. 6, the device of the present embodiment is being schemed
On the basis of 5 shown device structures, further, it can also include：Acquisition module 13, if for after the variation of the anticipation
The crosstalk cancellation that the type of the CPE of line is supported is linear crosstalk cancellation, then according to the linear crosstalk elimination side
Formula obtains linear crosstalk rain scavenging coefficient；If the crosstalk cancellation that the type of online CPE is supported after the variation of the anticipation
For nonlinear crosstalk cancellation, then nonlinear crosstalk rain scavenging coefficient is obtained according to the nonlinear crosstalk cancellation.
The device of the present embodiment can be used for performing the technical solution of embodiment of the method shown in Fig. 1, Fig. 3 or Fig. 4, in fact
Existing principle is similar with technique effect, and details are not described herein again.
Further, the indication message further includes the nonlinear crosstalk rain scavenging coefficient.
Further, the indication message is the information being encapsulated in the online preset field re-matched in signaling.
Fig. 7 is the structure diagram of one embodiment of CPE of the present invention, as shown in fig. 7, the device of the present embodiment can wrap
It includes：Receiving module 21 and processing module 22, wherein, receiving module 21, for receiving the switching of vector quantization controlled entity VCE transmissions
Indicate information, the indication message includes the information for being used to indicate crosstalk cancellation；Processing module 22, for passing through
The crosstalk cancellation for stating indication message instruction carries out crosstalk elimination.
The device of the present embodiment can be used for performing the technical solution of embodiment of the method shown in Fig. 2, Fig. 3 or Fig. 4, in fact
Existing principle is similar with technique effect, and details are not described herein again.
Fig. 8 is the structure diagram of the further embodiment of VCE of the present invention, as shown in figure 8, the device of the present embodiment can be with
Including：Processor 11 and transmitter 12, wherein, processor 11, the quantity for working as online customer headend equipment CPE will be sent out
During changing, the type of online CPE after the type of online CPE before the variation and the anticipation variation is determined；It is described
The type of CPE refers to that online CPE is entirely the mixing of non-linear CPE or non-linear CPE and linear CPE；It is described linear
CPE is only to support that pair circuit being connected with CPE carries out a CPE for linear crosstalk elimination, the non-linear CPE be support simultaneously pair and
The circuit that CPE is connected carries out the CPE that linear crosstalk is eliminated and nonlinear crosstalk is eliminated；Transmitter 12, if determined for described
Variation before line the type of CPE and the Type-Inconsistencies of CPE online after the variation of the anticipation, then according to the change of anticipation
The crosstalk cancellation that the type of online CPE is supported after change CPE online before the variation sends indication message,
The indication message includes being used to indicate the crosstalk cancellation that CPE is used after the variation.
The device of the present embodiment can be used for performing the technical solution of embodiment of the method shown in Fig. 1, Fig. 3 or Fig. 4, in fact
Existing principle is similar with technique effect, and details are not described herein again.
Further, the processor 11 is reached the standard grade specifically for working as at least one linear CPE, determine before described reach the standard grade
The CPE of line is entirely non-linear CPE, and online CPE is the mixing of non-linear CPE and linear CPE after reaching the standard grade described in anticipation；It is described
Transmitter 12, specifically for it is described it is determining reach the standard grade before CPE online after the reaching the standard grade of type and the anticipation of the CPE of line
Type-Inconsistencies, then according to the linear crosstalk cancellation that the type of CPE online after the reaching the standard grade of the anticipation is supported to described
Online CPE sends the indication message before reaching the standard grade.
Further, the processor 11, it is offline specifically for working as all online linear CPE, determine it is described it is offline before
Online CPE is the mixing of non-linear CPE and linear CPE, and the anticipation offline rear online CPE is entirely non-linear CPE；Institute
Transmitter 12 is stated, specifically for the determining type of the offline preceding CPE in line and CPE online after the offline of the anticipation
Type-Inconsistencies, then according to the anticipation it is offline after online CPE the nonlinear crosstalk cancellation supported of type to
The offline preceding online CPE sends the indication message.
Further, the processor 11, if what the type of CPE online after being additionally operable to the variation of the anticipation was supported
Crosstalk cancellation is linear crosstalk cancellation, then obtaining linear crosstalk according to the linear crosstalk cancellation eliminates system
Number；If the crosstalk cancellation that the type of online CPE is supported after the variation of the anticipation is nonlinear crosstalk cancellation,
Nonlinear crosstalk rain scavenging coefficient is then obtained according to the nonlinear crosstalk cancellation.
Further, the indication message further includes the nonlinear crosstalk rain scavenging coefficient.
Further, the indication message is the information being encapsulated in the online preset field re-matched in signaling.
Fig. 9 is the structure diagram of another embodiment of CPE of the present invention, as shown in figure 9, the device of the present embodiment can be with
Including：Receiver 21 and processor 22, wherein, receiver 21, for receiving the switching instruction of vector quantization controlled entity VCE transmissions
Information, the indication message include the information for being used to indicate crosstalk cancellation；Processor 22, for passing through the switching
Indicate that the crosstalk cancellation of information instruction carries out crosstalk elimination.
The device of the present embodiment can be used for performing the technical solution of embodiment of the method shown in Fig. 2, Fig. 3 or Fig. 4, in fact
Existing principle is similar with technique effect, and details are not described herein again.
Figure 10 is the structure diagram of one embodiment of copper wire broadband access system of the present invention, as shown in Figure 10, this reality
The system for applying example includes：VCE11, CO12, only a linear CPE13 for the support pair circuit being connected with CPE progress linear crosstalk elimination,
And the non-linear CPE14 that pair circuit being connected with CPE carries out linear crosstalk elimination and nonlinear crosstalk is eliminated is supported simultaneously；Institute
The structure that Fig. 5 or Fig. 6 shown device embodiments may be used in VCE11 is stated, accordingly, can be performed shown in Fig. 1, Fig. 3 or Fig. 4
The technical solution of embodiment of the method, implementing principle and technical effect are similar, and details are not described herein again；The non-linear CPE14 can
Using the structure of Fig. 7 shown device embodiments, accordingly, the skill of embodiment of the method shown in Fig. 2, Fig. 3 or Fig. 4 can be performed
Art scheme, implementing principle and technical effect are similar, and details are not described herein again.
Further, the structure of Fig. 8 shown device embodiments may be used in the VCE11, accordingly, can perform figure
1st, the technical solution of embodiment of the method shown in Fig. 3 or Fig. 4, implementing principle and technical effect are similar, and details are not described herein again；It is described
The structure of Fig. 9 shown device embodiments may be used in non-linear CPE14, accordingly, can perform shown in Fig. 2, Fig. 3 or Fig. 4
The technical solution of embodiment of the method, implementing principle and technical effect are similar, and details are not described herein again.
In several embodiments provided by the present invention, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
Only a kind of division of logic function can have other dividing mode in actual implementation, such as multiple units or component can be tied
It closes or is desirably integrated into another system or some features can be ignored or does not perform.Another point, it is shown or discussed
Mutual coupling, direct-coupling or communication connection can be the INDIRECT COUPLING or logical by some interfaces, device or unit
Letter connection can be electrical, machinery or other forms.
Described this may or may not be as the unit that separating component illustrates it is physically separate, as unit
The component of display may or may not be physical unit, you can be located at a place or can also be distributed to more
In a network element.Some or all of unit therein can be selected according to the actual needs to realize this embodiment scheme
Purpose.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
That each unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, is used including some instructions so that a computer
It is each that equipment (can be personal computer, server or the network equipment etc.) or processor (processor) perform the present invention
The part steps of embodiment the method.And aforementioned storage medium includes：USB flash disk, mobile hard disk, read-only memory (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
The medium of program code can be stored.
Those skilled in the art can be understood that, for convenience and simplicity of description, only with above-mentioned each function module
Division progress for example, in practical application, can be complete by different function modules by above-mentioned function distribution as needed
Into the internal structure of device being divided into different function modules, to complete all or part of function described above.On
The specific work process of the device of description is stated, the corresponding process in preceding method embodiment can be referred to, details are not described herein.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (15)
1. a kind of method that crosstalk is eliminated, which is characterized in that including：
When the quantity of online customer headend equipment CPE will change, the class of online CPE before the variation is determined
The type of online CPE after type and the anticipation variation；The type of the CPE refers to that online CPE is entirely non-linear
The mixing of CPE or non-linear CPE and linear CPE；The linear CPE is only pair circuit being connected with CPE to be supported to carry out linearly
The CPE that crosstalk is eliminated, the non-linear CPE are that pair circuit being connected with CPE is supported to carry out linear crosstalk elimination and non-thread simultaneously
Property crosstalk eliminate CPE；
If differ before the determining variation in the type of the CPE of line and the type of CPE online after the variation of the anticipation
It causes, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation CPE online before the variation
Indication message is sent, the indication message includes being used to indicate the crosstalk elimination side that CPE is used after the variation
Formula.
It is 2. according to the method described in claim 1, it is characterized in that, described when the quantity of online customer headend equipment CPE is
When will change, the type of online CPE after the type of online CPE before the variation and the anticipation variation is determined,
Including：
When at least one linear CPE reaches the standard grade, determine that online CPE before described reach the standard grade is entirely non-linear CPE, reach the standard grade described in anticipation
Online CPE is the mixing of non-linear CPE and linear CPE afterwards；
If in the type of the CPE of line and the type of CPE online after the variation of the anticipation before the determining variation
Inconsistent, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation is online before the variation
CPE send indication message, including：
It is described it is determining reach the standard grade before CPE online after the reaching the standard grade of type and the anticipation of the CPE of line Type-Inconsistencies, then
The linear crosstalk cancellation supported according to the type of CPE online after the reaching the standard grade of the anticipation is online before described reach the standard grade
CPE sends the indication message.
It is 3. according to the method described in claim 1, it is characterized in that, described when the quantity of online customer headend equipment CPE is
When will change, the type of online CPE after the type of online CPE before the variation and the anticipation variation is determined,
Including：
When all online linear CPE are offline, it is the mixed of non-linear CPE and linear CPE to determine the offline preceding online CPE
It closes, the anticipation offline rear online CPE is entirely non-linear CPE；
If in the type of the CPE of line and the type of CPE online after the variation of the anticipation before the determining variation
Inconsistent, then the crosstalk cancellation supported according to the type of CPE online after the variation of anticipation is online before the variation
CPE send indication message, including：
The determining type of the offline preceding CPE in line and the Type-Inconsistencies of CPE online after the offline of the anticipation, then
According to the anticipation it is offline after online CPE the type nonlinear crosstalk cancellation supported to it is described it is offline before online
CPE sends the indication message.
4. method described in any one of claim 1 to 3, which is characterized in that it is described before the variation it is online
Before CPE sends indication message, the method further includes：
If the crosstalk cancellation that the type of online CPE is supported after the variation of the anticipation is linear crosstalk cancellation,
Linear crosstalk rain scavenging coefficient is then obtained according to the linear crosstalk cancellation；
If the crosstalk cancellation that the type of online CPE is supported after the variation of the anticipation is nonlinear crosstalk elimination side
Formula then obtains nonlinear crosstalk rain scavenging coefficient according to the nonlinear crosstalk cancellation.
5. according to the method described in claim 4, it is characterized in that, the indication message further includes the nonlinear crosstalk
Rain scavenging coefficient.
6. method described in any one of claim 1 to 3, which is characterized in that the indication message is is encapsulated in
Information in the online preset field re-matched in signaling.
7. a kind of method that crosstalk is eliminated, which is characterized in that including：
The indication message that vector quantization controlled entity VCE is sent is received, the indication message includes being used to indicate crosstalk
The information of cancellation, the type of online CPE and anticipation before the quantity variation that the indication message is online CPE
After the quantity variation of CPE during the Type-Inconsistencies of online CPE, CPE's online after the variation according to the anticipation VCE
The information that the crosstalk cancellation that type is supported is sent；The type of the CPE refers to that online CPE is entirely non-linear CPE,
Or the mixing of non-linear CPE and linear CPE；The linear CPE is only pair circuit being connected with CPE to be supported to carry out linear crosstalk
The CPE of elimination, the non-linear CPE are that pair circuit being connected with CPE is supported to carry out linear crosstalk elimination and non-linear string simultaneously
Disturb the CPE of elimination；
Crosstalk elimination is carried out by the crosstalk cancellation that the indication message indicates.
8. a kind of vector quantization controlled entity VCE, which is characterized in that including：
Determination type module, for when the quantity of online customer headend equipment CPE will change, determining the variation
The type of online CPE after the type of preceding online CPE and the anticipation variation；The type of the CPE refers to online
CPE is entirely the mixing of non-linear CPE or non-linear CPE and linear CPE；The linear CPE is only support pair and CPE phases
Circuit even carries out the CPE of linear crosstalk elimination, and the non-linear CPE is to support pair circuit being connected with CPE into line simultaneously
Property crosstalk elimination and nonlinear crosstalk eliminate CPE；
Transceiver module, if for before the determining variation after the type of CPE of line and the variation of the anticipation it is online
The Type-Inconsistencies of CPE, then according to the crosstalk cancellation that the type of CPE online after the variation of anticipation is supported to the change
Online CPE sends indication message before change, and the indication message is used including being used to indicate CPE after the variation
Crosstalk cancellation.
9. VCE according to claim 8, which is characterized in that the determination type module, specifically for working as at least one line
Property CPE reach the standard grade, determine that online CPE before described reach the standard grade is entirely non-linear CPE, online CPE right and wrong after reaching the standard grade described in anticipation
The mixing of linear CPE and linear CPE；
The transceiver module, specifically for it is described it is determining reach the standard grade before after the reaching the standard grade of type and the anticipation of the CPE of line
The Type-Inconsistencies of the CPE of line, then the linear crosstalk elimination side supported according to the type of CPE online after the reaching the standard grade of the anticipation
Formula CPE online before described reach the standard grade sends the indication message.
10. VCE according to claim 8, which is characterized in that the determination type module, it is all online specifically for working as
Linear CPE it is offline, it is the mixing of non-linear CPE and linear CPE to determine the offline preceding online CPE, anticipation it is described offline
Online CPE is entirely non-linear CPE afterwards；
The transceiver module, specifically for it is described it is determining it is offline before line the type of CPE with after the offline of the anticipation
The Type-Inconsistencies of the CPE of line, the then nonlinear crosstalk supported according to the type of the offline rear online CPE of the anticipation are eliminated
Mode sends the indication message to the offline preceding online CPE.
11. VCE according to any one of claims 8 to 10, which is characterized in that further include：
Acquisition module, if the crosstalk cancellation that the type of CPE online after variation for the anticipation is supported is linear
Crosstalk cancellation then obtains linear crosstalk rain scavenging coefficient according to the linear crosstalk cancellation；If the variation of the anticipation
The crosstalk cancellation that the type of online CPE is supported afterwards is nonlinear crosstalk cancellation, then according to the non-linear string
It disturbs cancellation and obtains nonlinear crosstalk rain scavenging coefficient.
12. VCE according to claim 11, which is characterized in that the indication message further includes the non-linear string
Disturb rain scavenging coefficient.
13. VCE according to any one of claims 8 to 10, which is characterized in that the indication message is is encapsulated in
Information in the online preset field re-matched in signaling.
14. a kind of customer headend equipment CPE, which is characterized in that including：
Receiving module, for receiving the indication message of vector quantization controlled entity VCE transmissions, the indication message includes
The information of crosstalk cancellation is used to indicate, online CPE before the quantity variation that the indication message is online CPE
Type with after the quantity variation of the CPE of anticipation during the Type-Inconsistencies of online CPE, the VCE is according to the variation of the anticipation
The information that the crosstalk cancellation that the type of online CPE is supported afterwards is sent；The type of the CPE refers to that online CPE is complete
Portion is the mixing of non-linear CPE or non-linear CPE and linear CPE；The linear CPE is only to support pair line being connected with CPE
Road carries out the CPE of linear crosstalk elimination, and the non-linear CPE is pair circuit being connected with CPE to be supported to carry out linear crosstalk simultaneously
Eliminate the CPE eliminated with nonlinear crosstalk；
Processing module, the crosstalk cancellation for being indicated by the indication message carry out crosstalk elimination.
15. a kind of copper wire broadband access system, which is characterized in that including：Vector quantization controlled entity VCE, it central office CO, only supports
Pair circuit being connected with customer headend equipment CPE carries out the linear CPE of linear crosstalk elimination and supports simultaneously pair and CPE phases
Circuit even carries out the non-linear CPE that linear crosstalk is eliminated and nonlinear crosstalk is eliminated；The VCE uses claim 8~13
Any one of described in VCE, the non-linear CPE is using the CPE described in claim 14.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/091400 WO2016077991A1 (en) | 2014-11-18 | 2014-11-18 | Crosstalk cancellation method, apparatus and system |
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| CN105814804B true CN105814804B (en) | 2018-06-26 |
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| CN109600179B (en) | 2017-09-30 | 2021-04-27 | 富士通株式会社 | Method and device for estimating linear crosstalk between channels and receiver |
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| WO2014054043A1 (en) * | 2012-10-03 | 2014-04-10 | Sckipio Technologies S.I Ltd | Hybrid precoder |
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| US9374133B2 (en) * | 2011-07-25 | 2016-06-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for saving power in a telecommunications system |
| EP2763324B1 (en) * | 2011-11-03 | 2016-09-07 | Huawei Technologies Co., Ltd. | Method, apparatus and system for reducing interference in digital subscriber line |
| US9614582B2 (en) * | 2013-05-07 | 2017-04-04 | Metanoia Communications Inc. | Dynamic rate adaptation methods in a vectored G.fast system |
| WO2015039309A1 (en) * | 2013-09-18 | 2015-03-26 | 华为技术有限公司 | Method, apparatus and system for initializing line |
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| EP3200354A1 (en) | 2017-08-02 |
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